JPS60182008A - Thin film magnetic head - Google Patents
Thin film magnetic headInfo
- Publication number
- JPS60182008A JPS60182008A JP3661984A JP3661984A JPS60182008A JP S60182008 A JPS60182008 A JP S60182008A JP 3661984 A JP3661984 A JP 3661984A JP 3661984 A JP3661984 A JP 3661984A JP S60182008 A JPS60182008 A JP S60182008A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- magnetic
- magnetically permeable
- recording
- track
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 82
- 239000010409 thin film Substances 0.000 title claims abstract description 47
- 230000004907 flux Effects 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 10
- 239000010408 film Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000003302 ferromagnetic material Substances 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 8
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 abstract description 5
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 230000005415 magnetization Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、垂直磁気記録媒体に情報を記録１■Ｊ生し、
かつ、上記記録媒体の温度・湿度伸縮や磁気記録再生装
置を構成する機械要素の寸法誤差及び数個誤差に基づく
上記記録媒体上の記録トラックと磁気ヘッド間の相対的
位置ずれが発生した際にも記録媒体の情報読取誤りが生
じない磁気ヘッドに関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to recording information on a perpendicular magnetic recording medium.
In addition, when a relative positional deviation between the recording track on the recording medium and the magnetic head occurs due to temperature/humidity expansion/contraction of the recording medium or dimensional error or several-dimensional error of mechanical elements constituting the magnetic recording/reproducing device. The present invention also relates to a magnetic head that does not cause errors in reading information from a recording medium.
従来例の構成とその問題点
垂直磁気記録は従来の長手方向磁気記録より本質的に高
密度記録に適していることが知られている。しかし、再
生過程においてはまだいろいろ問題があった。例えば、
電磁誘導による巻線形磁気ヘッドで再生する場合には、
単磁極形ヘッドや、リング形へ、ドが提案されている。Conventional Structures and Problems Perpendicular magnetic recording is known to be inherently more suitable for high-density recording than conventional longitudinal magnetic recording. However, there were still many problems during the regeneration process. for example,
When playing with a wound magnetic head using electromagnetic induction,
A single magnetic pole type head, a ring type head, and a de type have been proposed.
リング形−・７ドで再生する場合、垂直記録の特徴であ
る短波長信号を再生するためには、ギャップ長を極端に
小さくする必要があり、その場合磁気ヘッドの磁気回路
能率が非常に悪くなる。再生感度を上げるために巻線数
を増やしていくと、へ・トイ／ダンタンスの増大による
自己共振周波数が低下する。一方、記録波長の短波長化
に伴い信号周波数が高くなるため、磁気へラドの自己共
振周波数の低下は信号再生において、極めて不都合てあ
っｌと。また、単磁極形ヘッドにおいても、巻線形であ
るため、同様の問題をもっている。電磁誘導形ヘッドで
共通したさらに大きな問題は、ヘッドと記録媒体間の相
対速度が小さい場合、再生出力電圧が小さくなり、その
対策としては巻線数の増大となり、上記問題を大きくす
る。一方、磁気ヘッドを多数並設するマルチトラック構
成（（おいては、巻線スペースが問題となる。さらに、
薄膜技術で構成する場合には、巻線数が限られ、高感度
な再生へ、ドを実現できない。When reproducing a ring-type 7-wavelength signal, it is necessary to make the gap length extremely small in order to reproduce the short wavelength signal that is a characteristic of perpendicular recording, and in this case, the efficiency of the magnetic circuit of the magnetic head is extremely poor. Become. When the number of windings is increased in order to increase reproduction sensitivity, the self-resonant frequency decreases due to an increase in toy/dantance. On the other hand, as the recording wavelength becomes shorter, the signal frequency becomes higher, so a decrease in the self-resonance frequency of the magnetic herad is extremely inconvenient in signal reproduction. In addition, a single magnetic pole type head also has a similar problem because it is a wound type head. An even bigger problem common to electromagnetic induction heads is that when the relative speed between the head and the recording medium is small, the reproduction output voltage becomes small, and the solution to this problem is to increase the number of windings, which aggravates the above problem. On the other hand, in a multi-track configuration in which many magnetic heads are arranged side by side, the winding space becomes a problem.Furthermore,
When constructed using thin film technology, the number of windings is limited, making it impossible to achieve high-sensitivity playback.
これらの問題を解決するために、最近、磁気抵抗効果（
以下ＭＲと略記する）ヘッドが注目されている。従来の
ＭＲヘッドは、例えは、短冊状ＭＲ素子の長手方向に電
流を流Ｉ〜、記録媒体にＭＲ素子を垂直に配置し、信号
磁界が素子面内に、長手方向と直角に入る素子単体形Ｍ
Ｒヘッドがある。このタイプのＭＲヘッドでは、ヘッド
構造のみに起因する波長応答特性はＭＲ素子幅Ｗに」；
って決定されることが知られている。この波長損失を充
分小さくするためには素子幅を波長程度にする必要があ
り、これ゛は短波長指向のヘッドにとっては極めて不利
である。一方、ＭＲ素子の厚さ方向の両側に高透磁率の
磁性体を配置したシールド形ＭＲヘッドがある。このタ
イプのＭＲへ、ドは従来のリング形巻線ヘッドと略同じ
波長応答を示し、かなり短波長まで高感度に使用できる
ことが知られている。しかし、ＭＲ素子と両側の高透磁
率磁性体との間には磁気的、電気的な絶縁を施す必要が
あり、この間の絶縁層厚ｇ４２ｇ２が従来のリング形巻
線ヘッドのギー）・ツブ艮に相当する。さらに、近似的
にはｇ、のギャップ損失とｇ２のギャップ損失の積の形
になるため、短波長におけるギャップ損失を充分小さく
するためには、ｇ１＋ ｇ２共極端に小さくする必要が
あり、この状況下で、磁気的、電気的にリークのない狭
ギャップ長を形成することは極めて困難である。In order to solve these problems, recently the magnetoresistive effect (
(hereinafter abbreviated as MR) heads are attracting attention. In a conventional MR head, for example, a current is passed in the longitudinal direction of a strip-shaped MR element, the MR element is arranged perpendicularly to the recording medium, and a signal magnetic field enters the element plane at right angles to the longitudinal direction of the element. Shape M
There is an R head. In this type of MR head, the wavelength response characteristic caused only by the head structure depends on the MR element width W.
It is known that it is determined that In order to sufficiently reduce this wavelength loss, it is necessary to make the element width comparable to the wavelength, which is extremely disadvantageous for heads oriented to short wavelengths. On the other hand, there is a shield type MR head in which a magnetic material with high magnetic permeability is arranged on both sides of the MR element in the thickness direction. It is known that this type of MR has substantially the same wavelength response as a conventional ring-shaped wire-wound head, and can be used with high sensitivity up to considerably short wavelengths. However, it is necessary to provide magnetic and electrical insulation between the MR element and the high permeability magnetic materials on both sides, and the thickness of the insulating layer between them (g42g2) is the same as that of the conventional ring-shaped wire-wound head. corresponds to Furthermore, since the approximate form is the product of the gap loss of g and the gap loss of g2, in order to sufficiently reduce the gap loss at short wavelengths, it is necessary to make both g1 and g2 extremely small. It is extremely difficult to form a narrow gap length with no magnetic or electrical leakage.
更に、垂直記録媒体がｃ、−ｃｒのような良導電性月利
より構成される場合にはＭＲ累子と記録媒体間の電気的
リークも考雄する必要があった。Furthermore, when the perpendicular recording medium is composed of a highly conductive material such as c or -cr, it is necessary to consider electrical leakage between the MR transducer and the recording medium.
加えて、従来のＭＲヘッドでは記録ヘッドとして専用の
へ、ドを独立に設けねばならぬ不都合も有していた。In addition, conventional MR heads have the disadvantage that they must be provided with a separate head dedicated to the recording head.
発明の目的
不発明は、上記のような電気的リークや磁気抵抗素子幅
損失及びギャップ損失のない垂直磁化記録再生用磁気ヘ
ッドを実現すると同時に、磁気へラドと記録媒体上の記
録トラ、りの相対的な位置ずれ（以下、オフトラックと
称する）が発生した場合にも情報の読取誤りが発生しな
いように磁気ヘッドの１１生Ｉ・ラック幅に比べて広い
トう、り幅て記録媒体上への書き込みが可能な磁気へ、
ドを提供することを目的とする。OBJECT OF THE INVENTION An object of the invention is to realize a magnetic head for perpendicular magnetization recording and reproducing without electrical leakage, magnetoresistive element width loss, and gap loss as described above, and at the same time, it is possible to realize a magnetic head for perpendicular magnetization recording and reproducing without electrical leakage, magnetoresistive element width loss, and gap loss as described above, and at the same time, to realize In order to prevent information reading errors from occurring even if a relative positional shift (hereinafter referred to as off-track) occurs, the head and track width of the magnetic head are wider than the rack width of the magnetic head. to a magnetic field that can be written to.
The purpose is to provide a
発明の構成
本発明は上記目的を達成するために、以下の部材によっ
て構成することを特徴とする。Configuration of the Invention In order to achieve the above object, the present invention is characterized by being configured by the following members.
（２Ｌ）磁気記録媒体上の信号磁化から発生した磁束を
検出して、信号電圧を発生する磁気抵抗素子（以下ＭＲ
累子と称する）、
（ｂ） 上記磁気記録媒体に記録されている信号磁化か
ら発生する信号磁束を上記ＭＲ素子に導く透磁性薄膜、
（ｃ）ＭＲ素子を通過した信号磁束を再び磁気記録媒体
に還流させる透磁性体、
（ｄ）上記（＆）及び（ｂ）の磁性薄膜と略同一平面上
に形成され記録信号に応じて磁化することにより、記録
媒体に記録を行なう記録専用道（１ｆｉ性薄膜、（＋３
）上記（ｂ）及び（ｄ）の透磁性薄膜に励磁磁界を印加
するための巻線、あるいは巻線を有する透磁性体、
（ｆ） 上記（ａ）〜（Ｃ）あるいは必要に応じて上記
（ｄ） Ｉ （ｅ）も含む薄膜を電気的に絶縁する絶縁
体、（ｑ） 上記（＋Ｌ）〜（０の部拐から成る記録再
生兼用の垂直磁気記録用磁気抵抗効果形磁気へ、ド、（
ｈ） 記録媒体裏面に透磁性薄膜または透磁性体を有す
る垂直記録媒体。(2L) A magnetoresistive element (hereinafter referred to as MR) that detects the magnetic flux generated from signal magnetization on a magnetic recording medium and generates a signal voltage.
(b) a magnetically permeable thin film that guides the signal magnetic flux generated from signal magnetization recorded on the magnetic recording medium to the MR element; (c) a magnetic recording medium that redirects the signal magnetic flux that has passed through the MR element; (d) A dedicated recording path (1 fi sexual thin film, (+3
) A winding for applying an excitation magnetic field to the magnetically permeable thin film of (b) and (d) above, or a magnetically permeable body having a winding, (f) (a) to (C) above, or the above as necessary. (d) An insulator that electrically insulates the thin film including I (e), (q) A magnetoresistive magnet for perpendicular magnetic recording for both recording and reproduction, consisting of the above (+L) to (0) components, and ,(
h) A perpendicular recording medium having a magnetically permeable thin film or magnetically permeable material on the back surface of the recording medium.
本発明によれば、記録媒体裏面に透磁性薄膜捷たは透磁
性体を有する２層膜垂直記録媒体に記録された信号磁化
によって発生した磁束は透磁性薄膜の下端部に導かれ、
その上端部からＭＲ素子の下端部へ導かれ、その上端部
から透磁性体を通り媒体」π而の透磁性薄膜または透磁
性体に戻る閉磁路を通るため、単体形ＭＲヘッドにおけ
るＭＲ素子幅損失、シールド形ＭＲヘッドにおけるギヤ
、プ損失がない。さらに、導電性記録媒体と組合わぜた
場合でも電気的リークの問題がなく、またＭＲ素子に安
定に非直線性歪を低減でき、高密度垂直磁化再生が行え
る。According to the present invention, magnetic flux generated by signal magnetization recorded in a two-layer perpendicular recording medium having a magnetically permeable thin film or a magnetically permeable material on the back surface of the recording medium is guided to the lower end of the magnetically permeable thin film.
The width of the MR element in a single MR head is such that it passes through a closed magnetic path from its upper end to the lower end of the MR element, passes through a magnetically permeable material, and returns to the magnetically permeable thin film or magnetic material of the medium. There is no gear loss in shield type MR heads. Furthermore, even when combined with a conductive recording medium, there is no problem of electrical leakage, nonlinear distortion can be stably reduced in the MR element, and high-density perpendicular magnetization reproduction can be performed.
記録再生トラ、り幅については、記録時には巻線あるい
は巻線を有する透磁性体より励磁磁界を発生しＭＲ素子
に信号磁束を誘導する透磁性薄膜及び記録専用薄膜の両
者を同時に磁化して記録媒体上への情報の書込みを行な
うので記録媒体」二の記録トラック幅は磁気ヘッドの再
生トラック幅に比較して広くなる。一方再生時には、Ｍ
Ｒ素子に流入する再生信号磁束は磁束誘導用透磁性薄膜
（上記ｂ）を介するものに限定され記録専用磁極は再生
に寄与しないため、再生トラック幅は上記磁束誘導用透
磁性膜の長さで規定され記録トラック幅に比べて狭くな
る。Regarding the recording/reproducing track width, during recording, an excitation magnetic field is generated from a winding or a permeable body having a winding, and both a magnetically permeable thin film that induces signal magnetic flux to the MR element and a recording-only thin film are simultaneously magnetized. Since information is written on the medium, the recording track width of the recording medium is wider than the reproduction track width of the magnetic head. On the other hand, during playback, M
The reproduction signal magnetic flux flowing into the R element is limited to the one that passes through the magnetic flux guiding magnetically permeable thin film (above b), and the recording-only magnetic pole does not contribute to reproduction. Therefore, the reproduction track width is equal to the length of the magnetic flux guiding magnetically permeable film. It is narrower than the recording track width.
実施例の説明
以下に本発明の一実施例の構成について、第１図ととも
に説明する。DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to FIG.
垂直異方性を有する記録層１２の裏面に透磁性薄膜１１
が配置されるようにベース１０上に形成された２層構成
の磁気記録妊トドを用いる垂直６ｆＬ記録再生において
、ＭＲ素子５の長手方向に電極６．７を介して電流を印
加し、ＭＲ素子上端部を磁束還流用透磁性体１と磁気的
に結合し、ＭＲ素子の下端部を磁束誘導用透磁性薄膜８
の上端部と磁気的に結合し、透磁性向°膜８を磁気記録
媒体に当接又は近接させ、上記ＭＲ素子５及び透磁性薄
膜８を電気的に絶縁する。２は透磁性体１に形成された
切欠き溝であり、非磁性体３が充填される。A magnetically permeable thin film 11 is provided on the back surface of the recording layer 12 having perpendicular anisotropy.
In vertical 6fL recording/reproduction using a two-layer magnetic recording device formed on the base 10 such that The upper end of the MR element is magnetically coupled to a magnetically permeable material 1 for magnetic flux return, and the lower end of the MR element is connected to a magnetically permeable thin film 8 for magnetic flux guidance.
The MR element 5 and the magnetically permeable thin film 8 are electrically insulated by being magnetically coupled to the upper end of the MR element 5 and the magnetically permeable thin film 8 brought into contact with or close to the magnetic recording medium. 2 is a notch groove formed in the magnetically permeable material 1, and is filled with a non-magnetic material 3.
更に、ＭＲ素子５．電極６，７．透磁性薄膜８と略同−
乎ｔｆｎの基板上両側に記録専用磁極として機能する透
磁性薄膜１３．１４を設ける。該記録専用磁極１３．１
４は上記ＭＲ素子５．電極６゜７、透磁性薄膜８とは磁
気的に分離するため微小量の間隙を有して形成される。Furthermore, an MR element 5. Electrodes 6, 7. Almost the same as the magnetically permeable thin film 8.
Magnetically permeable thin films 13 and 14, which function as write-only magnetic poles, are provided on both sides of the tfn substrate. The recording-only magnetic pole 13.1
4 is the MR element 5. The electrode 6.7 and the magnetically permeable thin film 8 are formed with a minute gap in order to be magnetically separated.
次に、透磁性薄膜８及び記録専用磁極１３，１４を励磁
する手段を具備せしめるための実施例について、ＭＲ素
子６の中央部Ａ −Ａ’での断面図である第２図及び第
３図を用いて説明する。Next, regarding an embodiment for providing a means for exciting the magnetically permeable thin film 8 and recording-only magnetic poles 13 and 14, FIGS. Explain using.
第２図は、巻線１６２基板１及び非磁性体カバー１５の
周囲に形成する方法を図示している。本実施例では、巻
線に信号電流を印加することにより、磁性基板１を励磁
磁化し、磁化された基板１から発生する磁場により、透
磁性薄膜８及び記録専用薄膜１３．１４を磁化するもの
である。FIG. 2 illustrates a method of forming the winding 162 around the substrate 1 and the non-magnetic cover 15. In this embodiment, the magnetic substrate 1 is excited and magnetized by applying a signal current to the winding, and the magnetic permeable thin film 8 and recording thin film 13, 14 are magnetized by the magnetic field generated from the magnetized substrate 1. It is.
第３図は、記録媒体１８をはさんで透磁性体１７を対向
配置し、その周囲に巻＆１１６を施した場合を示してい
る。本実施例では、巻線１６に信号電流を印加して透磁
性体１７より磁界を発生させ、該磁界により透磁性薄膜
８及び記録専用薄膜１３゜１４を磁化するものである。FIG. 3 shows a case in which magnetically permeable bodies 17 are arranged opposite to each other with a recording medium 18 in between, and a winding &116 is applied around the magnetically permeable bodies 17. In this embodiment, a signal current is applied to the winding 16 to generate a magnetic field from the magnetically permeable body 17, and the magnetically permeable thin film 8 and recording thin films 13 and 14 are magnetized by the magnetic field.
捷だカバー１９は基板１と同様に透磁性体に切欠き’ｔ
ｔ（Ｆを形成し非磁性体を充填したものであり、非磁性
体のカバーと比べて外部ノイズの影響を防ぐ効果がある
。The cover 19 has a notch in the magnetically permeable material like the substrate 1.
t(F) and filled with a non-magnetic material, it is more effective in preventing the influence of external noise than a non-magnetic material cover.
なお、本実施例においては基板に溝状の切欠き（第１図
中２）を有するものについて示したが、この切欠きの幅
を著しく太きくシ／こ極限状態に相当する構造、即ち、
記録媒体との対向面をすべて適当な厚さを有する非磁性
体で隔離することも可能である。In this example, the substrate has a groove-shaped notch (2 in Fig. 1), but the width of this notch is made extremely large, and the structure corresponds to the ultimate state, that is,
It is also possible to isolate the entire surface facing the recording medium with a non-magnetic material having an appropriate thickness.
なお、以上の説明では、ＭＲ素子のバイアス法について
は述べていないが、各々の実施例において最適な方法を
採用することが可能である。Note that although the above description does not describe the method of biasing the MR element, it is possible to adopt an optimal method in each embodiment.
次に、上記実施例の動作について説明する。Next, the operation of the above embodiment will be explained.
第４図は磁気ディスク上の記録パターンについて説明す
るものであるが、２０は第１図に示した透磁性薄膜８に
より記録されたトランクであり、２１及び２２は記録専
用磁極１３及び１４により記録されたトラックである。FIG. 4 explains the recording pattern on the magnetic disk. Reference numeral 20 indicates a trunk recorded by the magnetically permeable thin film 8 shown in FIG. This is the truck that was used.
一方、再生時には、以上に説明したように、第１図に示
した透磁性薄膜８を介して誘導された磁束のみがＭＲ素
子に流入するので、信号電圧再生に寄与するのは上記透
磁性薄膜が接触する領域２３のみである。On the other hand, during reproduction, as explained above, only the magnetic flux induced through the magnetically permeable thin film 8 shown in FIG. 1 flows into the MR element, so the magnetically permeable thin film contributes to signal voltage reproduction. This is only the region 23 in which the two contacts.
したがって、オフトラック量が２１あるいは２２のトラ
ック幅以下であれば、再生信号電圧の減衰もなく隣接ト
ランクからの妨害も発生しない。Therefore, if the off-track amount is equal to or less than 21 or 22 track widths, there will be no attenuation of the reproduced signal voltage and no interference from adjacent trunks.
以上のように、本発明によれば実用上避けることができ
ないオフトラックに対して読取誤りを発生しない磁気へ
ンドを提供することが可能になる。As described above, according to the present invention, it is possible to provide a magnetic head that does not cause reading errors due to off-track, which is practically unavoidable.
発明の効果
本発明は上記のような構成であり、以下に示す効果が得
られるものである。Effects of the Invention The present invention has the above-described configuration, and provides the following effects.
（２Ｌ）再生トラック幅に比べて広いトラック幅で記録
できるため、オフトラックか発生しても読取誤りが発生
しない。(2L) Since recording can be performed with a wider track width than the playback track width, reading errors do not occur even if off-track occurs.
（ｂ） 上記の広トラック讐込を実現するために、記録
専用磁極として２つの薄膜を記録再生用薄膜プロセスを
形成した平面と略同一平面上に追加するだけで良いため
簡便である。(b) In order to realize the wide track width described above, it is simple because it is only necessary to add two thin films as write-only magnetic poles on substantially the same plane as the plane on which the thin film process for recording and reproduction is formed.
（Ｃ） 再生用信号電圧検出手段としてＭＦＩ素子を用
いているため、再生時に記録専用磁極から流入する磁束
の影響を容易に軽減できる。(C) Since the MFI element is used as the reproduction signal voltage detection means, the influence of magnetic flux flowing from the write-only magnetic pole during reproduction can be easily reduced.
第１図は、本発明の一実施例の斜視図、第２図及び第３
図は、第１図での励磁手段を示す断面図、第４図は記録
媒体上への記録トラックの様子を示す平面図である。
１・・・・・・磁性基板、２・・・・・切欠き溝、３・
・・・・・非磁性体、５・・・・・・ＭＲ素子、６，７
・・・・・・電極、８・・・・・・透磁性薄膜、１ｏ・
・・・・・ベース、１１・・・・・・透磁性薄膜、１２
・・・・・・垂直磁気記録媒体、１３．１４・・・・・
・記録専用磁極、１５・・・・・カバー、１６・・・・
・・巻線、１７°°°°°°透磁性体ブロック、１８・
・・・・磁気記録媒体、１９・・・・・・カバー、２１
’、２２・・・・・・記録専用磁極による記録トラック
、２０・・・・・・透磁性薄膜８による記録トラック、
２３・・・・・・再生トラック。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
図FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 and FIG.
The figure is a sectional view showing the excitation means in FIG. 1, and FIG. 4 is a plan view showing the recording track on the recording medium. 1...Magnetic substrate, 2...Notch groove, 3...
...Nonmagnetic material, 5...MR element, 6,7
... Electrode, 8 ... Magnetically permeable thin film, 1o.
... Base, 11 ... Magnetically permeable thin film, 12
・・・・・・Perpendicular magnetic recording medium, 13.14・・・・・・
・Magnetic pole for recording only, 15...Cover, 16...
・・Winding wire, 17°°°°°° Magnetically permeable block, 18・
...Magnetic recording medium, 19...Cover, 21
', 22... Recording track by magnetic pole exclusively for recording, 20... Recording track by magnetically permeable thin film 8,
23...Playback track. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure
Claims (1)
有する磁気記録媒体を用い、両端に電極を有する強磁性
体よりなる磁気抵抗効果素子の幅方向一端部に」７記磁
気記録媒体に接する透磁性薄膜をイｉＢ気的に結合し、
かつ、上記磁気抵抗効果素子の幅方向他端に上記透磁性
薄膜を介して」７記磁気抵抗素子に流入した磁束を上記
磁気記録媒体へ還流させる透磁性体を磁気的に結合し、
かつ、上記磁気抵抗素子と上記透磁性薄膜とを電気的に
絶縁してなる再生用磁極部及び１４士生型圧を検出する
手段が形成された平面と略同一平面上に上記磁気抵抗効
果素子及び上記透磁性薄膜と磁気的に分離されて設けら
れた透磁性Ｎ膜からなる記録専用磁極を有し、上記記録
専用磁（２）磁束還流のための透磁性体の周囲に巻線を
施し、この巻線に信号電流を印加して透磁性薄膜（３）
透磁性体からなる補助磁極を磁気記録媒体をはさんで対
向配置し、上記補助磁極に巻線を施し、巻線に信号電流
を印加して透磁性薄膜を励(1) Using a magnetic recording medium having a magnetically permeable thin film or a magnetically permeable material on the back surface of the recording magnetic layer, one end in the width direction of a magnetoresistive element made of a ferromagnetic material having electrodes at both ends is used. The adjacent magnetically permeable thin films are electrically coupled,
and magnetically coupling to the other end in the width direction of the magnetoresistive element via the magnetically permeable thin film a magnetically permeable material that causes the magnetic flux that has flowed into the magnetoresistive element described above to flow back to the magnetic recording medium,
and the magnetoresistive element is placed on substantially the same plane as the plane on which the reproduction magnetic pole part formed by electrically insulating the magnetoresistive element and the magnetically permeable thin film and the means for detecting the 14 Shisei pressure are formed. and a recording-only magnetic pole made of a magnetically permeable N film provided magnetically separated from the magnetically permeable thin film, and the recording-only magnetic pole (2) has a winding around the magnetically permeable body for magnetic flux return. , by applying a signal current to this winding, the magnetically permeable thin film (3)
Auxiliary magnetic poles made of a magnetically permeable material are placed facing each other with a magnetic recording medium in between, windings are applied to the auxiliary magnetic poles, and a signal current is applied to the windings to excite the magnetically permeable thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661984A JPS60182008A (en) | 1984-02-28 | 1984-02-28 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3661984A JPS60182008A (en) | 1984-02-28 | 1984-02-28 | Thin film magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60182008A true JPS60182008A (en) | 1985-09-17 |
Family
ID=12474815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3661984A Pending JPS60182008A (en) | 1984-02-28 | 1984-02-28 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60182008A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411914A2 (en) * | 1989-08-04 | 1991-02-06 | Matsushita Electric Industrial Co., Ltd. | Thin film magnetic head |
| EP0414473A2 (en) * | 1989-08-24 | 1991-02-27 | Matsushita Electric Industrial Co., Ltd. | Magnetic head device |
-
1984
- 1984-02-28 JP JP3661984A patent/JPS60182008A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0411914A2 (en) * | 1989-08-04 | 1991-02-06 | Matsushita Electric Industrial Co., Ltd. | Thin film magnetic head |
| EP0414473A2 (en) * | 1989-08-24 | 1991-02-27 | Matsushita Electric Industrial Co., Ltd. | Magnetic head device |
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